Machine for making reinforced-concrete pipe.



H. R. MOMAHON- MAGHINE FOR MAKING REINFORCED CONCRETE PIPE.

APPLICATION FILED DEC. 28, 1907.

Patented May 17, 1910.

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'Ej i ANDREW a GRAHAM E0. WOTU-LIIHOGFIAPNERS, WASHINGTON. 0.x:

958, l 56 Patented May 17, 1910.

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ANDREW a GRAHAM to, FHOTO-LIIHOGRAPHERS. WASHINGTON. nnc.

H. B. MOMAHON. MACHINE FOR MAKING REINFORCED GONGRETE PIPE. APPLICATIONFILED DEC. 28, 1907.

958, 156m Patented May 1?, 19m

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STATES ATENT Flt lttlli.

HARRY R. lVIoMAI-ION, OF CLEVELAND, OHIO.

MACHINE FOR MAKING REINFORCED-CONCRETE PIPE.

To all whom it may concern:

Be it known that I, HARRY R. MOMAHON, a citizen of the United States,resident of Cleveland, county of Cuyahoga, and State of Ohio, haveinvented a new and useful Improvement in Machines for MakingReinforced-Concrete Pipe, of which the following is a specification, theprinciple of the invention being herein explained and the best mode inwhich I have contemplated applying that principle, so as to distinguishitfrom other inventions.

My invention relates to machines for making reinforced concrete pipe.

The object of said invention is the production of concrete pipe havingthe physical characteristics necessary to meet the requirements of theservice which it is desired to perform, and at the same time to elfectsuch production in an eflicient and economical manner.

The said invention consists of means hereinafter fully described andparticularly set forth in the claims.

The annexed drawings and the following description set forth in detail,certain mechanism embodying the invention, the disclosed meansconstituting but one of various mechanical forms in which the principleof the invention may be applied.

In said annexed drawings z-Figure 1 represents a front elevation, partlyin vertical axial section, of a machine embodying my invention. Fig. lrepresents a partial section, upon an enlarged scale, of the lowerportion of one side of the mold forming a part of said machine. Fig. 2represents a plan of such machine. Fig. 3 represents a horizontalsection of the machine taken upon the plane indicated by line III-III inFig. 1. Fig. 4 represents a detailed elevational View, upon an enlargedscale, of the reinforcement guiding-means and Fig. 5 represents a bottomplan of same. Fig. 6 represents an elevational view, partly in section,of the tamping mechanism of the machine and Fig. 7 represents a sectionof same taken upon the plane indicated by line VIIVII in Fig. 6, suchlatter view being taken in the direction of the arrow in said figure.Fig. 8 represents a horizontal section taken upon the plane indicated bythe line VIIIVIII in Fig. 6 showing also, in lan, a portion of the mold.Said Figs. 6, and 8 are also drawn on an enlarged scale.

Specification of Letters Patent. Patented ltlay 17, 1910,

Application filed December 28, 1907.

Serial No. 408,341.

upon which is mounted a horizontal rot-atable table B. This table isprovided on its under surface with beveled gear teeth 6 which areengaged by the bevel-gear C. This latter gear is mounted upon the shaftC which is suitably mounted 1n a bearing a and driven by a suitablemotor D. The table B is provided with a central pilot 6 and isadditionally supported upon its under surface by anti-friction rollers aa, and upon it is supported a mold E. This mold in its generalcharacteristics is similar to molds ordinarily used for the purpose ofmanufacturing concrete pipe sections, in that it consists of an outercylindrical shell 0 and an inner cylindrical shell 6 concentric with theouter and a removable bottom ring 6 The following modifications are,however, introduced: The bottom ring is provided with two apertures e ewhich receive the ends of the reinforcement members J J and is providedwith rollers e suitably mounted beneath its lower surface and with ahand-hole e and cover .2 therefor. This hand-hole is located, as shown,in the vicinity of that portion of the bottom ring containing theapertures e a The upper portion of the rotatable table B is formed witha depression 6 having parallel sides b 6 This depression receives themold, the latter being rolled onto and off of the table by means of therollers 6 Fixed to bases A A, are four upright guiding-members G G whoseupper ends support a horizontal frame G. Intermediate of the mold andthe frame G is a vertically movable carrier H provided with fourguidingrollers h h engaging and traveling upon the uprightguiding-members G G. Mounted in a bracket H suitably secured to thecarrier H is a horizontally rotatable wormwheel h. This worm-wheel iscentrally threaded to receive a vertical screw G which is fixedlymounted in the frame G in a suitable manner. A shaft if is horizontallymounted upon the carrier and has fixedly secured thereto a worm 72.Figs. 2 and 3, which engages the worm-wheel h. The one end of said shaftif has fixed upon it a bevel-gear h which is engaged by a secondbevel-gear if slidably mounted by means of a feather and groove, upon avertical shaft H This shaft is rotatably mounted by means of a stepbearing h in the carrier H. Slidably mounted upon the said shaft H is athird bevel-gear g which is engaged by a bevel-gear g fixed to a shaft 9mounted in a bearing 9 the latter being fixed to the frame G. This shaft9 is driven by means of bevel-gears g and g, the latter being fixed to avertical shaft Gr suitably mounted in fixed bearings g g and (4 Fixed tothe bottom of shaft G Fig. 3, is a worm-wheel G which is engaged androtated by means of a worm C fixed to the shaft C. It will therefore beobserved that the rotation of the shaft C will effect simultaneously therotation of the table B and mold E, and a vertical movement of thecarrier H.

Mounted upon the frame G is a bearing G in which is fixed a rod g andmounted upon this rod as a bearing are two reels G G. These reels aremounted so as to be slidable along the rod g and are fixed in positionby means of suitable set-screws g 9 By these means it will be observedthat the reels are adjustable relatively to each other along theircommon bearing-rod. Upon these reels are wound flexible reinforcement J,which consists preferably of ordinary commercial wire of suit-able size.

Extending downwardly from the carrier H is a reinforcementguiding-device K, Figs. 1 and 4. This device consists of two verticalmembers K I and is secured to the carrier H by means of bolts 72,7passing through slots 72,8 formed in the carrier, whereby the said twomembers are laterally adjustable relatively to each other. Such lateraladjustment is further maintained by means of two radial cross-arms 7cpivoted at one end and secured at the other end by means of bolts 7t"passing through curved slots 7: it formed in the vertical members K Krespectively. The lower ends of these two members are provided withauxiliary portions K K respectively, which are secured in place by meansof bolts 713 It which pass through slots 70 7a" formed therein and inthe main members K K and by means of which the members K and K may beextended and adjusted longitudinally. Secured to the bottom of the twomembers K K" re spectively are two horizontal circularly curved membersK K, the center of whose curvature is in the axis of the rotatable table13. Guiding-rollers 7c 70 are mounted upon the main members K I andadditional rollers 70 7c are mounted upon the auxiliary members K K asshown. Mounted upon the bottom of the members K I are guiding-rollers L70 and 71: 71: The reinforcing wire passes downwardly from the rollersthrough a slot it, Fig. 3, behind the rollers 70' 70 over the rollers 71if and around the rollers 70 k and 71S 72 whence it is fed into the moldin a manner hereinafter described.

in the plate.

The above described guiding-device is located vertically above theannular space of the mold in which the pipe structure is formed, so thatby lowering the carrier H such guiding-device may be projected. intosuch space.

Fixed to the shaft h is a sprocket Z over which runs a chain Z whichdrives a second sprocket Z This second sprocket is fixed to acountershaft L which is mounted in bearings upon the carrier H, as shownin Fig. 3. Upon the end of this shaft L is mounteda sprocket Z? overwhich passes a second chain Z which drives a sprocket Z which is fixedto a shaft L. Upon the said shaft L are fixed, by means of setscrews m ma series of cams M M, Figs. 6 and 7, which respectively engage lugs 11fixed to or integral with a series of tamping rods N N. These rods arepreferably three in number and are mounted in and supported by anadjustable plate N which is secured to the hangers n n which form thebearing for the shaft L and supported by means of bolts 91, n which passthrough slots 12 a formed The shaft L is located ver tically above theannular space in the mold as shown in Fig. 3, and the rods N are placedtransversely of said space and so that they may be caused to projectinto same when the carrier H is moved downwardly. The slots 12- renderthe plate N adjustable in the direction of the axis of shaft L, as willbe readily understood. The two outer rods N N are mounted in slots a nformed in the plate N and are secured by means of auxiliary bolts n apassing through the slots 71 a, and plates a a secured by such bolts. Itwill therefore be seen that the two outer rods N may be adjusted towardand from the center rod, and the position of the center rod may bechanged by adjusting the plate N. The three rods may therefore be placedto meet the conditions imposed by molds of varying diameters and havingannular spaces of varying width. Secured to the bottom of rods N bymeans of setscrews, aretampers 11 W, as shown in Figs. 6 and 8. Thesetampers may, by means of the set-screws, be adjusted angularly upontheir respective rods N. Upon each rod N is fixed or formed a collar nand intermediately of such collar and the plate N is a coiled spring a",by means of which latter the rod is actuated downwardly after havingbeen lifted by its cam M as will be readily understood.

Discharging into the annular space and at a point interi'nediate of thetamping rods N and the reinforcement guiding-means K is a tube 0provided in its interior with a feeding-screw 0. This tube 0communicatcs with a suitable source or reservoir of concrete (not shown)from which the latter is fed into the annular space by the said screw 0.The latter is rotated by any suitable means, (not shown).

In preparing the above described machine for operation the required moldE is placed upon the rotatable table B, the carrier H having first beenraised so as to cause the guiding-means and tamping-means to clear thetop of such mold. The two guidingmembers K K are then adjusted so thatthey'may enter the annular space of the mold and have their lowerextremities in proximity to the inner and outer shell of the mold uponso doing. The reinforcement wire is then passed through the slot 7&under rollers k 76 over rollers is and around the rollers 73 70 aspreviously described. The carrier is then lowered so as to bring suchlower extremities of the guiding-means in proximity to the bottom ring 6The table is then turned to bring the apertures e e out of the verticalplane of the guiding-means K. The ends of the wire are now carriedaround to the vicinity of the hand-hole, the cover having first beenremoved, and are then bent and passed through the apertures e 0*respectively in the bottom ring. Prior to such operation, however, thetamping rods are adjusted so that when they are caused to enter theannular space of the mold, the two outside tampers n n are caused to liein close proximity to the inner and outer shells of the mold, and tocause the center tamper to lie at or near the middle of such space.These tampers are adjusted angularly upon their rods so as to overlapeach other in the direction of the rotation of the mold, so the entireplane of the annular space is intersected during the rotation of themold by such tampers. Such adjustment having been effected the motor iscaused to rotate the mold in the direction indicated by the arrow inFig. 2 and the concrete is caused to feed into the annular space. Inthis manner the rein forcing wire is laid into the mold in a helicalform and near the inner and outer portions of such space. During suchoperation the concrete covers the reinforcement and the tampers tampsuch concrete and eliminate voids and air-spaces which may form therein.The reinforcement is thus progressively fed into the mold from bottom totop and concrete simultaneously fed therein and to progressively fillsuch mold therewith. After the entire mold is filled and provided withreinforcement, the wire is severed and the carrier I-I raised to aheight sufficient to clear the top of the mold. The latter is thenremoved from the table, the top ring then placed thereon and the upperend of the section formed in the usual manner. Sufficient wire is leftto provide the lastportion of the section with reinforcement, as will bereadily understood. The mold is then allowed to stand until the concretehas sufficiently set, as has heretofore been the practice in themanufacture of concrete pipe sections, whereupon the bottom and toprings are detached and the section of pipe removed from the mold.

Other modes of applying the principle of my invention may be employed,instead of the one explained, and change may be made as regards themechanism herein disclosed, provided the means covered by any one of thefollowing claims be employed.

I, therefore, particularly point out and distinctly claim as myinvention 1. In a machine for manufacturing reinforced concrete pipe,the combination of a horizontal shaft, a rotatable table for receiving amold, a mold mounted upon the latter, a carrier mounted so as to becapable of vertical movement toward and from said table, meanscomprising said shaft for effecting both the rotatable and verticalmovement, reinforcement guiding-means mounted upon said carrier; andmeans for automatically feeding concrete to said mold.

2. In a machine for manufacturing reinforced concrete pipe, thecombination of a horizontal shaft, a rotatable table for re ceiving amold and a mold mounted upon the latter, a carrier mounted so as to becapable of vertical movement toward and from said table, meanscomprising said shaft for effecting both the rotatable and verticalmovement, reinforcement guidingmeans mounted upon said carrier, tampingmechanism mounted upon the latter, and means for automatically feedingconcrete to said mold.

8. In a machine for manufacturing reinforced concrete pipe, thecombination of a horizontal shaft, a rotatable table for receiving amold, a stationary frame, a carrier vertically movable toward and fromsaid table and means comprising said shaft for effecting both therotatable and vertical movement, reinforcement guiding-means and tampingmeans mounted upon said carrier, a reinforcement supply, mounted uponsaid frame, and means for automatically feeding concrete to said mold.

4. In a machine for manufacturing reinforced concrete pipe, thecombination of a horizontal shaft, a rotatable table for receiving amold, a stationary frame, a carrier vertically movable toward and fromsaid table and means comprising said shaft for effecting both therotatable and vertical movement, reinforcement guiding-means andtampinp' means mounted upon said carrier, a rein orcement supply mountedupon said frame, and means for automatically feeding concrete to saidmold.

5. In a machine for manufacturing reinforced concrete pipe, thecombination of a horizontal shaft, a rotatable table for receiving amold, a stationary frame, a carrier vertically movable toward and fromsaid table and means comprising said shaft for effecting both therotatable and vertical movement; adjustable reinforcement guiding-means,tamping means, said guiding and tamping means being mounted upon saidcarrier; a lGlllfOI'CBlIlGDt supply, and means for automatically feedingconcrete to said mold.

(5. In a machine for manufacturing reinforced concrete pipe, thecombination of a horizontal shaft, a rotatable table for receiving amold, a stationary frame, a carrier vertically movable toward and fromsaid table and means comprising said shaft for effecting both therotatable and vertical movement; adjustable reinforcement guiding-means, tamping means, said guiding and tamping means being mountedupon said carrier; a reinforcement supply mounted upon said frame andmeans for automatically feeding concrete to said mold.

7. In a machine for manufacturing reinforced concrete pipe, thecombination of a horizontal shaft, a rotatable table for receiving amold, a stationary frame, a carrier vertically movable toward and fromsaid table and means comprising said shaft for effecting both therotatable and vertical movement; adjustable reinforcement guid1ing-means, adjustable tamping means, said guiding and tamping meansbeing mounted upon said carrier; a reinforcement supply mounted uponsaid frame and means for automatically feeding concrete to said mold.

8. In a machine for manufacturing reinforced concrete pipe, thecombination with a mold, of reinforcement, of guiding-means adapted toguide two reinforcing elements simultaneously in such mold.

9. In a machine for manufacturing reinforced concrete pipe, thecombination with a mold, of guiding means adapted to guide tworeinforcing elements simultaneously in such mold, said guiding meansbeing adjustable laterally.

10. In a machine for manufacturing reinforced concrete pipe, thecombination with a mold, of guiding means comprising two parts eachadapted to guide a reinforcing clement, one of such parts beingadjustable longitudinally.

11. In a machine for manufacturing reinforced concrete pipe, thecombination with a mold, of guiding-means comprising two partsrelatively adjustable to each other and each adapted to guide areinforcing element, one of such parts being adjustable longitudinally.

Signed by me, this letth day of December,

HARRY R. MGMAHON. Attested by IVitnesses:

JENNIE E. GARY, LENA A. DIRLANE.

